/*
	????????ȡ??string?ײ???????

*/

#include <string>
#include <cstring>
#include <iostream>

int main()
{
	std::string str = "hello world!";
	char* arr = &*str.begin(); //?˾???ȡ?ײ??????Ŀ?ʼλ??
	*(arr + 2) = 'z';
	std::cout << strlen(arr) << std::endl;
	std::cout << arr << std::endl;
	return 0;
}
